Feed roll for wire-stitching machines



Sept. 30, 1947. R. MINKow FEED ROLL AFOR WIRE, STITCHING MACHINES Filed Aug. 24. V1944.y

www ROQT Maf/iw Y v A Patented Sept. 30, 1947 FEED ROLL Fon WIRE-STITCHING MACHINES Robert Minkovv, New York, N. Y.

Application August 24, 1944, Serial No. 550,984

i claim. (o1. 14o- 131) This invention relates to an improved feed I roll construction Ifor use with machines for forming and driving Wire staples, and is an improvement over the feed roll mechanism disclosed in Patent No. 2,150,824 issued March 14, 1939.

An object of this invention is to provide an improved feed roll mechanism wherein the wire contacting portions thereof is of resilient construction so as to provide for the desired frictional contact with the wire to obtain the necessary positive feeding of the Wire.

Another object of this invention is to provide a feed roll mechanism of this kind wherein the wire contacting means may be adjusted so as to provide for the positive feeding of wires of different thicknesses.

. A furtherobject of this invention is to provide a feed roll construction including a. roller body and a substantially U-shaped resilient wire contacting member adjustably secured to said body.

A further object of this invention is to provide a feed roll construction including a roller body, a substantially U-shaped resilient wire contacting member adjustably secured to said body, and one or more springs seated in sockets formed in the body and bearing against the inner side of the bight of the U-shaped member.

A further object of this invention is to provide a feed roll construction including a roller body and a U-shaped resilient wire feeding member having an end thereof secured to the body and the other end free and slidable in a recess formed in the body.

To the foregoing objects, and others which may hereinafter more fully appear, the invention consists of the novel construction, combination and arrangement of parts, as will be more specifically referred to and illustrated in the accompanying drawings, but it is to be understood that changes, variations, and modifications may be resorted to which fall within the scope of the invention as claimed.

In the drawings:

Figure 1 is a detail front elevation of a feed roll mechanism, constructed according to an embodiment of this invention, mounted on a wire forming and stapling machine, the latter being fragmentarily shown.

Figure 2 is a detail front elevation partly broken away and in section of one of the feed rolls.

Figure 3 is a fragmentary sectional view taken on line 3-3 of Figure 1.

Figure 4 is a detail front elevation partly broken away and in section of a modified form of this invention.

Referring to the drawing, the numeral I designates generally a supporting structure for a wire feeding means which is carried by a wire forming and stapling machine generally designated as I3. The support I0 includes an upper guide member II and a lower guide member I2 disposed in spaced apart relation so as to expose a length of wire I4 between the confronting ends of the guides II and I2.

A pair of wire feeding rolls generally designated as I5 and I6 are rotatably carried by the support I Il and are movable in opposite directions so as to feed the wire I4 downwardly. The two rolls I5 and I6 are of like construction and each in- -cludes a roller body I1 which is formed with a central bore I8 within which a roller shaft I9 is adapted to engage. The body I1 is also formed with an outer recess 20 within whicha washer 2I is adapted to seat and a bolt 22 extends through the Washer 2| and is threaded into the shaft I9 so as to hold the body I1 against rotation with respect to the shaft I9.

The body I1 has adjustably secured thereto a U-shaped resilient wire feeding member generally designated as 23. The feeding member 23 includes an arcuate bight 24 which has a curvature coincident with the periphery of the roller body I1 and parallel legs 25 which are of straight construction extend from the opposite ends of the bight 24. The legs 25 engage in slots 26 formed in the periphery of the body I1, the slots 26 having parallel inner walls 21. Each leg 25 is formed with an elongated slot 28 through which a headed fastening member 29 is adapted to engage, the fastening member 29 being threaded into the body I1. The wire feeding member 23 is of inherently resilient construction so that the curved or bowed bight thereof may ex during the feeding cycle. In order to provide an additional tensioning' means for the bight 24 I have provided for each feeding member 23 a pair of coil springs 30 which are seated in sockets 3l' formed in the body I1 in a position where the outer ends of the springs 30 will bear against the inner concave side of the bight 24.

Referring now to Figure 4, there is disclosed a modied form of this roller construction. In this modification a roller body 32 is provided which is formed with a, slot 33 opening through the periphery thereof and having a flat inner wall 34. A U-shaped wire feeding member 35 of inherently resilient construction has the arcuate bight 3B disposed thereof in outwardly spaced relation with respect to the periphery of the roller body 32. The U-shaped member 35 includes one elongated leg 31, having a slot 38 therein through which a headed fastening member 39 adjustably engages, the fastening member 39 being threaded into the body 32. The leg 31 engages within the slot 33, bearing against the straight inner wall 34 of this slot.

The opposite leg 40 of the feeding member 35 is substantially shorter in length than the leg 31. The leg 4|) slidably engages in a recess 4I formed 3 in the body 32 and the leg 40 is free to slide in and out of recess 4I as the bight 36 moves into contact or out of contact with the wire.

In the use and operation of this feeding construction the two rollers I5 and I6 are secured to the shafts I9, the latter being geared together by a suitable gear train so that these shafts will rotate in opposite directions. In other words, roller I5 will rotate in a clockwise direction, whereas roller I6 will rotate in a counter-clockwise direction. Roller I5 is preferably adjusted with respect to roller I5, so that the bight of the feeding member carried thereby will he in circumferentially adjusted position with respect to the bight of the feeding member of roller I5. A pointer 42 is secured to the supporting structure I0 i and the front face of roller I6 is formed with spaced apart indications 43 which are correlated with the pointer 42 so that roller IB may be selectively adjusted to the desired degree. As rollers I5 and I5 rotate with their confronting peripheries moving downwardly, wire I4 will be gripped between the two bights 24, and will thereby be moved downwardly for the distance that the bights 24 are in confronting relation. As the bights 24 grip the wire I4 between the two guides I1I and I2, the wire will be moved downwardly and the bights 24 will nex inwardly against the tension of springs 30.

By providing an adjustable wire feeding construction wires of different thicknesses may be fed, it being only necessary to loosen fastening members 29 and adjust the legs 25 of the feeding members to position the bight 24 in the desired spaced relation with respect to the periphery of roller body I'I. Furthermore, with a construction of this kind in the event either one or bot-h of the feeding members become worn, they may be readily replaced without requiring complete replacement of the roller construction.

What I claim is:

A wire feed roll comprising a disc-shaped roller body formed with a pair of diametrically disposed segment-shaped peripheral recesses and a, pair of spring receiving sockets between said recesses, a. U-shaped feeding member having an arcuate bight and parallel legs, the legs of said feeding member slidably engaging in said recesses, each leg having an elongated opening therein, a pair of headed fastening members engaging through said openings for slidably retaining said feeding member, and a pair of springs seated in said sockets and bearing against the inner side of said bight to normally urge said feeding member outwardly.

ROBERT MINKOW.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED S'A'I'ES PATENTS Number Name Date 2,150,824 Fischer Mar. 14, 1939 2,170,830 MinkoW Aug'. 29, 1939 2,199,241 Hoffeit Apr. 30, 1940 1,353,087 Swift, Jr Sept 14, 1920 1,443,430 Olgay Jan. 30, 1923 2,267,134 Post Dec. 23, 1941 2,117,806 Holmes May 17, 1938 1,460,526 Wolf et al. July 3, 1.923 1,855,163 Zeruneith Apr. 19, .1.932 

